A HIGH incidence of phosphate urinary calculi in sheep has been associated with the feeding of rations containing dibasic potassium phosphate (Lindley et al., 1953; Elam et al., 1956, 1957). Further, Lindley et al. (1953) observed elevated plasma phosphorus levels under these conditions. Emerick et al. (1959) observed high plasma phosphorus levels in lambs subsequently afflicted with urinary mi...

The mineral status in two ecosystems typical of the Iberian Peninsula was evaluated. Ecosystem I was formed by forests and ecosystem II by hilly areas. The levels of calcium, phosphorus, magnesium, iron, copper, zinc and selenium in soils, rations and serum were measured. The concentratons of iron, copper, zinc and selenium were also checked in liver. Ecosystem I showed higher values of every m...

The aim of this study was to assess lycopene intake in daily food rations of women (n = 725) from the Lower Silesia region. The data on the lycopene intake were collected using 24-hour recall and diet history questionnaire. The intake of lycopene was not too low. The average lycopene contents in the daily food rations of 725 women from Lower Silesia region was 7.5 mg. The highest lycopene intak...

Experiments were conducted to assess the feasibility of recycling poultry litter in the diets of young calves. Weaning rations containing 30% ensiled or unprocessed poultry litter gave unsatisfactory growth when fed to calves from two to twelve weeks of age. However, when these twelve week old calves were fed rations containing 30% or 50% poultry litter and sorghum, the costs/kg. gain were 19.5...

MEYER, J. H. AND W. A. HARGUS. Factors in@~t~~~ing food intake of rats fed low-fir&n rations. Am. J. Physiol. I g7(6) : I 350135** I g5g.-Rats fed low-protein rations increased food intake, weight gain and gain in lean body mass when forced to expend energy by low environmental temperature or exercise (swimming). Rats fed low-protein rations with a higher proportion of fat in their weight gain ...

Study organisms in chronic toxicological bioassays are often provided with excessive resources to remove food limitations as a confounding experimental variable. Under more ecologically realistic situations, resources are often less abundant and such restrictions may alter the responses of organisms to environmental contaminants. Here, we investigated the interaction between resource level and ...

Many marine invertebrates with complex life cycles produce planktonic larvae that experience environmental conditions different from those encountered by adults. Factors such as temperature and food, known to impact the larval period, can also affect larval size and consequently the size of newly settled juveniles. After documenting natural variation in the size of cyprids (the final larval sta...

Aim: The objective of the present study is to know the effect of feeding processed sweet sorghum (Sorghum bicolour (L) moench) crushed residue (SSCR) based complete ration on growth, feeding behavior and cost of gain in Murrah buffalo calves in order to compare the feeding value of SSCR with sorghum straw (SS) and also find out the efficient way of utilization of SSCR in the diets of growing bu...

The impact of the protein content of feed barley on the costs of feeding beef, dairy cattle, and swine in Montana is evaluated. A model of least-cost feed rations is constructed to analyze the marginal value of additional protein content in feed barley. The results indicate that increasing the protein content of feed barley above 12% will not substantially increase the value of barley to feeder...

In a series of three experiments, we tested the effects of short-term food variability on the larval development of Petrolisthes cabrilloi. We first reared seven sibling clutches of zoeae at 19°C in ten constant food rations (ranging 2-40 Artemia nauplii d) to determine maximal and minimal values for age and size at metamorphosis to the megalops stage. Mean age at metamorphosis ranged between 1...